Electrospun Li3.9Cr0.3Ti4.8O12 nanofibers as anode material for high-rate and low-temperature lithium-ion batteries
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Highly oriented zinc oxide nanofibers with a length of several centimeters are fabricated using a newly modified electrospinning method. Very different from the conventional electrospinning process, the fibers are collected between the electrodes. The key to success is the reduction of interelectrode distance and the use of an ultra strong electric field, which is about six times higher than conventional conditions.
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Nanofibers have gained much attention because of the large surface area they can provide. Thus, many fabrication methods that produce nanofiber materials have been proposed. Electrospinning is a spinning technique that can use an electric field to continuously and uniformly generate polymer and composite nanofibers. The structure of the electrospinning system can be modified, thus making changes to the structure, and also the alignment of nanofibers. Moreover, the nanofibers can also be treated, modifying the nanofiber structure. This paper thoroughly reviews the efforts to change the configuration of the electrospinning system and the effects of these configurations on the nanofibers. Excellent works in different fields of application that use electrospun nanofibers are also introduced. The studied materials functioned effectively in their application, thereby proving the potential for the future development of electrospinning nanofiber materials.
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Electropsipinning is a simple, but efficient and versatile, technology to produce polymeric nanofibers for diverse applications in both textile and non-textile areas. In this paper, recent research developments in electrospinning and electrospun nanofibers, especially thaose from the Centre for Material and Fiber Innovation, Deakin University, are introduced. Important findings on needleless mass-electrospinning and direct electrospinning of highly-twisted continuous manfiber yarns are presented.
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Electrospinning of nanofibers has emerged as a specialized processing technique for the formation of sub-micron fibers, with high specific surface areas. Electrospinning of Nanofibers in Textiles presents important new research in the dynamic and emerging field of electrospinning and covers all aspects of the technology as used to produce nanofiber
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Electrospinning is recognized as a new processing method to prepare nanofibers by emitting and stretching of polymer solution or melts under the electric field. The electrospun textiles possess many advantages such as small pore size,high surface area,very small and even diameters,and high ratios between lengths to diameter,which endow the electrospun nanofibers a broad application.Presently, the study of electrospinning nanofibers has received much attention around the world.In this paper,the equipments of electrospinning,the basic principles of electrospinning,and the research development of electrospun nanofibers were reviewed.Meanwhile,the applications of the electrospun nanofibers in many fields were introduced.At last,the development directions and foregrounds of the electrospun nanofibers were prospected.
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In order to study the effect of electrospinning parameters on diameter distribution of SCA nanofiber,SCA nanofibers were prepared by electrospinning process.The effect of mass concentration of the solution,distance,voltage,and speed of electrospinning on the morphology of the electrospun SCA nanofibers were investigated.The experiments were optimized and the optimal parameters were determined.SEM was applied to observe the morphology of the nanofibers and Photoshop CS 3.0 software was used for measurement and statistics of the nanofiber diameter.The results showed that SCA nanofiber diameter was more affected by mass concentration of the solution,the distance and speed of electrospinning than the voltage.
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Abstract This study shows that electrospinning nanofibers onto single microfibers allows for careful tailoring of material properties that may suit a wide variety of applications. The nanofiber‐coated microfibers are created by electrospinning nanofibers alongside a microfiber toward a collector that rotates around the microfiber. This force the nanofibers to be collected around the microfiber, creating a hierarchical structure that can be modified at nano scale. In this study, control of nanofiber diameters, nanofiber alignment, and nanofiber loading was evaluated. It was seen that varying polymer concentration affected the nanofiber diameters, collecting the nanofiber‐coated microfibers at different speeds changed the degree of alignment of the nanofibers and that changing the polymer feeding rate affected the loading density of the nanofibers collected. The carefully designed nanofiber‐coated microfibers have great potential in creation of highly porous materials with tailored properties down to nano scale. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
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Polyaniline / polyethylene oxide( PANI / PEO) nanofiber is prepared by electrospinning,and effects of voltage and receiving distance on diameter of electrospinning PANI / PEO nanofiber are studied and electrospinning parameters are optimized. Parallel nanofiber arrays are prepared by controlling the receiver and orientation arrangement of nanofiber is realized; single nanofiber sensor is prepared by controlling deposition times of electrospinning solution jets and detect on NH3. The result indicates that PANI / PEO nanofiber with diameter of105 nm is prepared when the voltage is 20 k V and the receiving distance is 20 cm,and the PANI / PEO nanofiber sensor prepared under above optimized parameters has good linear response to low concentration NH3 at room temperature.
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Regardless the low production rate, electrospinning remains the attractive technique for the nanofibers production in various fields. Thus, the development of a multi-jet technologies for electrospinning gives an opportunity to scale up and increase throughput of the fibers production. However, the multi-jet electrospinning technologies exhibit one major drawback– electrostatic mutual jet repulsion issue. In present research, we propose air blow-assisted multi-jet electrospinning system allowing production of nanofibers with yield, at least, tenfold higher than single jet electrospinning. The system produces nanofibers in two modes: multi-jet electrospinning and blow-assisted multi-jet electrospinning. In case of the latter, the application of sheath air stream allows the system to overcome the electrostatic mutual repulsion issue. These lead to the reduction of deviation of the polymer solution jets, the reduction of instabilities of the jets and the improvement of the control of the nanofibers deposition. Nanofibers morphology and size were investigated based on the scanning electron microscope micrographs. The comparison of the two modes shows changes in nanofibers morphology from beaded structure to fine nanofibers, and the slight increase in fiber mean size when the blowing assistance was applied to the process.
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